IS 2180: Specification for heavy duty burnt clay building bricks

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IS 2180 (1988) : Specification for heavy duty burnt clay
building bricks [CED 30: Clay and Stabilized Soil Products
for Construction]

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PROTECTED BY COPYRIGHT

IS : 2180 - 1988

( Reaffirmed 2002 )

Indian Standard

SPECIFICATION FOR
HEAVY DUTY BURNT CLAY BUILDING BRICKS

( Third Revision )

UDC 691-421

© Copyright 1988

BUREAU OF INDIAN STANDARDS

MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG
NEW DELHI 1 10002

Gr 1 June 1988

IS : 2180 - 1988

Indian Standard

SPECIFICATION FOR
HEAVY DUTY BURNT CLAY BUILDING BRICKS

( Third Revision )

0. FOREWORD

0.1 This Indian Standard ( Third Revision ) was
adopted by the Bureau of Indian Standards on
28 January 1988, after the draft finalized by the
GJay Products for Building Sectional Committee
had been approved by the Civil Engineering Divi-
sion Council.

0.2 This standard was first published in 1962 and
subsequently revised in 1970 and 1985. In this
third revision class designation of the bricks has
been based on the minimum compressive strength
of the bricks expressed in N/rnm2 instead of
kgf/cm2. Furthermore sub-classifications A and
B of bricks have been completely removed deleting
requirements of sub-class B bricks and the tole-
rances on dimensions of bricks have been changed.

0.3 Heavy-duty bricks ( also known as 'engineering
bricks' ) are generally required for masonry in

requirements for
dimensions and
duty burnt clay

1. SCOPE

1.1 This standard lays down
classification, general quality,
physical properties of heavy
building bricks.

2. TERMINOLOGY

2.1 For the purpose of this standard, definitions
given in IS : 2248-1981* shall apply.

3. CLASSIFICATION

3.1 The heavy duty bricks shall be classified on the
basis of average compressive strength as given
below:

Class
Designation

40
45

Average Compressive Strength

A

Not Less Than

N/mm2 ( kgf/cm2
approximate )

400 (400)
45*0 (450)

Less Than
N/mm2 (kgf/cm^
approximate)

45 (450)

heavy engineering works, such as bridge structures,
industrial foundations and multi-storeyed buildings.
In view of the establishment of various mechanized
plants, it is felt that some guidelines for the quality
requirements of such bricks should be laid down,
so that bricks of such strength could be judiciously
utilized.

0.4 For the purpose of deciding whether a parti-
cular requirement of this standard is complied
with, the final value, observed or calculated,
expressing the result of a test or analysis, shall be
rounded off in accordance with IS : 2-1960*. The
number of significant places retained in the rounded
off value should be the same as that of the speci-
fied value in this standard.

♦Rules for rounding off numerical values ( revised).

4. GENERAL QUALITY

4.1 Heavy duty burnt clay bricks shall be manu-
factured either by pressing or extrusion. They shall
be made from a processed clay or clays blended in
right proportions. The brick shall be burnt to the
correct maturing temperature of the clay or cJay
blend, properly soaked, annealed and cooled under
controlled conditions. When broken, the fractured
surface of the brick shall show a uniformly dense
structure free from large voids, laminations and
lime particles. Two bricks when struck together
shall emit a clear metallic ring.

4.2 The bricks shall have smooth rectangular faces
with sharp corners and shall be uniform in colour.

5. DIMENSIONS AND TOLERANCES

5.1 Dimensions — The standard size of heavy
duty clay building bricks shall be as follows:

♦Glossary of terms relating to clay products for building
{ first revision ).

Length

mm
190
190

Width

mm
90
90

Height

mm
90
40

IS: 2180 -1988

5,2 The maximum permissible tolerances on the
dimensions specified in 5.1 shall be as follows:

Tolerance on Individual Bricks

Dimensions

mm

190

90

40

mm

±4
±2

±2

6. FKYSiCAL KEQUiREMENTS

6.1 Compressive Strength — The bricks when
tested in accordance with the procedure laid down
in IS : 3495 ( Part 1 )-1976*, shall have a minimum
average compressive strength for various classes as
given in 3.1.

Note — In case any of the test results for compressive
strength exceed the upper limit of the class, the same shall
be limited to upper limit of the class for the purpose of
averaging.

6.1.1 The compressive strength of any individual
brick shall not fall below the minimum average
compressive strength specified for the corresponding
class of brick by more than 20 percent.

6.2 Water Absorption — The bricks when tested
according to the procedure laid down in IS : 3495
( Part 2 )-1976t after immersion in water for 24
hours, the average water absorption by mass shall
not be more than 10 percent,

6.2.1 If specified by the purchaser, 5 hours
boiling test according to the procedure laid down
in IS : 3495 ( Part 2 )- 19761 may also be done. In
that case, the average water absorption by mass
shall not be more than 15 percent.

6.3 EflBLorescence — The bricks when tested in
accordance with the procedure laid down in
IS : 3495 ( Part 3 )-I976J, the rating of efflorescence
shall be ^Nil'.

6.4 Bulk Density — The density of bricks shall
not be less than 2*5 g/cm^.

6.4.1 For obtaining the bulk density, the brick
shall be dried in a ventilated oven at a temperature
of 105 to 115*'G till it attains substantially constant
mass. The brick shall be cooled to room tempera-
ture and its mass shall be obtained. Thereafter,
the dimensions of the brick shall be measured
accurately and the overall volume computed. The
bulk density shall then be calculated as mass per
unit volume.

7. SAMPLING AND
CONFORMITY

CRITERION FOR

7.1 The method of sampling and the criterion for
conformity shall be in accordance with the pro-
cedure laid down in IS : 5454-1978*.

8. MARKING

8,1 Each brick shall be marked ( in the frog v/here
provided ) with the manufacturers identification
mark or initials,

8.1.1 Each brick may also be marked with the
Standard Mark.

Note — The use of the Standard Mark is governed by
the provisions of the Bureau of Indian Standards Act 1986,
and the Rules and Regulations made thereunder. Presence
of this mark on products covered by an Indian Standard
conveys the assurance that they have been produced to
comply with the requirements of that standard under a
well-defined system of inspection, testing and quality con-
trol which is devised and supervised by BIS and operated
by the producer, has the further safeguard that the products
as actually marketed are also continuously checked by BIS
for conformity to that standard. Details of conditions under
which a licence for the use of the Standard Mark may be
granted to manufacturers or producers, may be obtained
from the Bureau of Indian Standards.

♦Methods of tests for burnt clay building bricks: Part 1
Determination of compressive strength ( second revision ).

tMethods of tests for burnt clay building bricks: Part 2
Determination of water absorption ( sicond revision ).

JMethods of tests for burnt clay building bricks: Part 3
Determination of efflorescence ( second revision ).

♦Methods for sampling of clay
revision ),

building bricks ( Jirst

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